USB3.0 and USB2.0 are more common in our daily life. The difference between the two is: 1. The color of the middle plastic sheet at the interface is different; 2. The number of physical buses is different; 3. The transmission rate is different; 4. The power consumption is different; 5. The working mode is different.
1. The color of the interface is different
In order to distinguish USB3.0 and USB2.0 more intuitively, the standard specification stipulates the color of the interface. The color of the middle plastic sheet at the USB interface is different. The color of USB3.0 is blue. The color of USB2.0 is black.
2. The number of physical buses is different
Due to the different working modes, the two types of USB ports have different physical buses. USB2.0 has 4 wires, 2 power wires and 2 signal wires. USB3.0 has 5 wires, 2 sending data wires, two receiving data wires, and a ground wire.
3. Different transfer rates
The transfer rate of USB3.0 is about 320MB/S, and the theoretical upper limit is 640MB/S. The transfer rate of USB2.0 is 30MB/S, and the theoretical upper limit is 60MB/S.
4. Different power consumption
The power supply capacity of USB3.0 is 1A, that is, the power consumption of 5W, while the power supply capacity of USB2.0 is 0.5A and the power is 2.5W. Therefore, users who need to use the USB port to charge the mobile phone, it is best to choose the blue USB3.0 because its output power is higher!
5. Different working modes
Since USB3.0 can realize bidirectional transmission of data, its working mode is full-duplex mode. USB2.0 is half duplex mode.
